[mrtg] Re: OT Setting up a Router to Router test WAN

[Radick, Don (IHG)]

well, you're a bit confused with your terminology.
Your Cisco routers may have serial ports in addition
to your integrated CSU/DSU cards.  You can connect
routers back-to-back using a DCE and DTE cables via
the serial ports. This is detailed on the Cisco
web site.   You can also connect the routers
back-to-back via the CSU/DSU cards using a T1 crossover
cable.

Here is the diagram for a T1 crossover cable:

http://www.gcom.com/home/support/t1crossover.html


I think you will also need a "clock source" command on 
one of the CSU/DSU ports. Once the other side sees 
a valid clock, it will show "up up".

HTH,
Don




-----Original Message-----
From: Alan Rader [mailto:darlists at bakerd.com]
Sent: Wednesday, April 14, 2004 1:19 PM
To: mrtg at list.ee.ethz.ch
Subject: [mrtg] OT Setting up a Router to Router test WAN


I am trying to setup a test WAN.  I have Cisco routers (2611 & 3640)
both with an internal CSU/DSU.  I want to simulate a T1 connection
between them using serial ports and eigrp.  Can this be done using a
cross connect ethernet cable?  So far I have had no luck and the only
things I am finding on the internet are from years ago before internal
CSU/DSUs.
 
I have both serial ports setup with IPs and no shut.  I have tried both
a regular patch cable and a cross.  I don't get any links, just the
yellow alarm LED.  I have tried setting a clock rate of 2000000 on one
of the serial interfaces.  I also put encap PPP on one of them with no
luck.  Both interfaces have always show down down on anything I have
tired.
 
Can anyone help me or if it can't be done that way, let me know what I
need to do something like this?
 
Thanks
 
 

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